<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            display: grid;
            grid-template-columns: repeat(12,1fr);
            grid-template-rows: 50px 400px 50px;
            grid-template-areas: 'h h h h h h h h h h h h'
                                 'm m c c c c c c c c c c'
                                 'f f f f f f f f f f f f';
        }
        .header {
            grid-area: h;
            background-color: red;
        }
        .menu {
            grid-area: m;
            background-color: green;
        }
        .content {
            grid-area: c;
            background-color: pink;
        }
        .footer {
            grid-area: f;
            background-color: blue;
        }
        @media (max-width: 768px) {
            .container {
            grid-template-areas: 'h h h h h h m m m m m m'
                                 'c c c c c c c c c c c c'
                                 'f f f f f f f f f f f f';
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">头部</div>
        <div class="menu">菜单栏</div>
        <div class="content">内容展示</div>
        <div class="footer">底部</div>
    </div>
</body>
</html>